<ion-header>
    <header-component>
        <ion-toolbar>
            <ion-buttons class="button-left">
                <img navBackButton src="assets/imgs/return.svg" alt="">
            </ion-buttons>
            <ion-title>请假</ion-title>
        </ion-toolbar>
    </header-component>
</ion-header>
<ion-content class="ask-for-leave">
    666
</ion-content>